---
title: About Web pixel app extensions
description: Explore the API reference documentation for web pixel app extensions.
api_name: pixels
source_url:
  html: 'https://shopify.dev/docs/api/pixels'
  md: 'https://shopify.dev/docs/api/pixels.md'
---

ExpandOn this page

* [Reference documentation](https://shopify.dev/docs/api/pixels.md#reference-documentation)
* [Next steps](https://shopify.dev/docs/api/pixels.md#next-steps)

# About Web pixel app extensions

You can use a web pixel app extension to collect behavioral data for marketing campaign optimization and analytics. This guide provides the reference documentation for the web pixel app extension.

***

## Reference documentation

[Web pixel extension API\
\
](https://shopify.dev/docs/api/web-pixels-api)

[Learn about the sandboxing modes for web pixels, and the API references that are available for the sandbox.](https://shopify.dev/docs/api/web-pixels-api)

[Standard Events Reference\
\
](https://shopify.dev/docs/api/web-pixels-api/standard-events)

[Learn about the ways of tracking and sending events with web pixels.](https://shopify.dev/docs/api/web-pixels-api/standard-events)

***

## Next steps

* Learn how you can [use web pixels](https://shopify.dev/docs/apps/build/marketing-analytics/pixels) on an online store to collect behavioral data for marketing campaign optimization and analytics.
* [Create a web pixel app extension](https://shopify.dev/docs/apps/build/marketing-analytics/build-web-pixels) and subscribe to all events emitted by Shopify.

***

* [Reference documentation](https://shopify.dev/docs/api/pixels.md#reference-documentation)
* [Next steps](https://shopify.dev/docs/api/pixels.md#next-steps)